The watermarking based on wavelet fusion gains sharp edge and discontinuity in watermarked image due to embedding in smooth region. To solve this problem spatial fusion watermarking method is proposed in this paper. The image is decomposed into four levels by predicting the range of intensity. To improve the capacity of embedding, higher counted region is chosen for embedding which indirectly chooses sharp region. The Text or ROI data is watermarked in the chosen region by differentiating the pixel with one by the constraint of even or odd between the cover image and text or ROI. The decomposed images are composed by averaging the pixels of the regions greater than one. After extraction, the watermarked medical image is reconstructed to original medical image by reversible property. This system is evaluated with various metrics using standard medical images which show good quality and high imperceptibility with embedding capacity. © 2013 Springer.

Viswanathan P

School of Computer Science and Engineering

Chennai Campus

VenkataKrishna P.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Medical Image Spatial Fusion Watermarking System

Lecture Notes in Electrical Engineering Proceedings of the Fourth International Conference on Signal and Image Processing 2012 (ICSIP 2012)

Teleradiology allows transmission of medical images for clinical data interpretation to provide improved e-health care access, delivery, and standards. The remote transmission raises various ethical and legal issues like image retention, fraud, privacy, malpractice liability, etc. A joint FED watermarking system means a joint fingerprint/encryption/dual watermarking system is proposed for addressing these issues. The system combines a region based substitution dual watermarking algorithm using spatial fusion, stream cipher algorithm using symmetric key, and fingerprint verification algorithm using invariants. This paper aims to give access to the outcomes of medical images with confidentiality, availability, integrity, and its origin. The watermarking, encryption, and fingerprint enrollment are conducted jointly in protection stage such that the extraction, decryption, and verification can be applied independently. The dual watermarking system, introducing two different embedding schemes, one used for patient data and other for fingerprint features, reduces the difficulty in maintenance of multiple documents like authentication data, personnel and diagnosis data, and medical images. The spatial fusion algorithm, which determines the region of embedding using threshold from the image to embed the encrypted patient data, follows the exact rules of fusion resulting in better quality than other fusion techniques. The four step stream cipher algorithm using symmetric key for encrypting the patient data with fingerprint verification system using algebraic invariants improves the robustness of the medical information. The experiment result of proposed scheme is evaluated for security and quality analysis in DICOM medical images resulted well in terms of attacks, quality index, and imperceptibility. © 2013 IEEE.

IEEE Journal of Biomedical and Health Informatics

A Joint FED Watermarking System Using Spatial Fusion for Verifying the Security Issues of Teleradiology

Nowadays, the transmission of digitized medical information has become very convenient due to the generality of Internet. Internet has created the biggest benefit to achieve the transmission of patient information efficiently. However, it is easier that the hackers can grab or duplicate the digitized information on the Internet. This will cause the following problems of medical security and copyright protection. In order to fulfil the security and convenience issues of the patients following goals like the prevention of medical fault, the real-time detection of abnormal event, the support of clinical decision and developing of medical service based on patient has to be achieved. For this purpose this paper proposes the technique called binary embedding technique. It uses the binary information of the text embedded with semi reversible properties in the image are called binary embedding. This technique prevents the distortion of embedded information in the original image due to addition of noise. The concept of semi reversible property is used retains the original information, image quality before and after the process of watermarking is presented as a statistical analysis. © 2009 IEEE.

Journal	Data powered by TypesetLecture Notes in Electrical Engineering Proceedings of the Fourth International Conference on Signal and Image Processing 2012 (ICSIP 2012)
Publisher	Data powered by TypesetSpringer India
ISSN	1876-1100
Open Access	No